The Charles Kelly papers (1889-1971) contain personal materials, including his diary (1918-1971), a copy of his autobiography (1936), day books, and logs and journals of six river trips taken from 1932 to 1942. Included also is correspondence with colleagues exchanging information on research and writing, miscellaneous research materials, and published and unpublished manuscripts. Also present are periodicals in which some of his articles and photographs are published; a typescript copy of "The Field Notes of Robert Brewster Stanton, 1889-1890," which is an examination of the Colorado River for a railway line; and the "Journal of Albert King Thurber," an explorer of the area between the Sevier River Valley and the Colorado River. The collection contains copies of Kelly's six books published between 1930 and 1938. Several of Kelly's paintings of Southern Utah's red rock country are also part of the collection.
The Harry Longabaugh Jr. papers (1970) contain a transcript of a speech given by Longabaugh on 25 June 1970, at Weber County Library, Ogden, Utah. Longabaugh claims to be the son of Harry Longabaugh, the Sundance Kid. In this speech he talks about Butch Cassidy, the Sundance Kid, and their respective gang, and dispels some of the myths brought on by Twentieth Century Fox's movie, Butch Cassidy and the Sundance Kid.